source/__init__.py

@@ -34,6 +34,8 @@ from bpy.props import (
         EnumProperty,
         )
 
+from .measureit_sum_edge_lengths import *
+
 # --------------------------------------------------------------
 # Register all operators and panels
 # --------------------------------------------------------------
@@ -389,6 +391,9 @@ def register():
     # register internal property
     wm.measureit_run_opengl = BoolProperty(default=False)
 
+    #Register Sum Edge Lengths
+    bpy.utils.register_class(Sum_Edge_Lengths)
+    bpy.types.VIEW3D_MT_edit_mesh_edges.append(measureit_sum_edge_lengths.menu_func)
 
 def unregister():
     from bpy.utils import unregister_class
@@ -460,6 +465,9 @@ def unregister():
     if p in wm:
         del wm[p]
 
+    #Remove Sum Edge Lengths
+    bpy.utils.unregister_class(Sum_Edge_Lengths)
+    bpy.types.VIEW3D_MT_edit_mesh_edges.remove(measureit_sum_edge_lengths.menu_func)
 
 if __name__ == '__main__':
     register()

source/measureit_sum_edge_lengths.py

@@ -0,0 +1,52 @@
+import bpy
+import bmesh
+
+class Sum_Edge_Lengths(bpy.types.Operator):
+    bl_idname = "mesh.sum_edge_lengths"
+    bl_label = "Sum Edge Length"
+    bl_options = {'REGISTER', 'UNDO'}
+
+    def execute(self, context):
+        obj = context.object
+        if obj is None or obj.type != 'MESH':
+            self.report({'WARNING'}, "No mesh object selected")
+            return {'CANCELLED'}
+
+        bm = bmesh.from_edit_mesh(obj.data)
+        total_length = sum(e.calc_length() for e in bm.edges if e.select)
+        
+        # Adjust for unit scale
+        unit_settings = context.scene.unit_settings
+        unit_scale = unit_settings.scale_length
+        total_length *= unit_scale
+        
+        # Convert to the appropriate unit
+        if unit_settings.length_unit == 'METERS':
+            unit_length = 'm'
+        elif unit_settings.length_unit == 'CENTIMETERS':
+            total_length *= 100
+            unit_length = 'cm'
+        elif unit_settings.length_unit == 'MILLIMETERS':
+            total_length *= 1000
+            unit_length = 'mm'
+        elif unit_settings.length_unit == 'KILOMETERS':
+            total_length /= 1000
+            unit_length = 'km'
+        elif unit_settings.length_unit == 'INCHES':
+            total_length *= 39.3701
+            unit_length = 'in'
+        elif unit_settings.length_unit == 'FEET':
+            total_length *= 3.28084
+            unit_length = 'ft'
+        elif unit_settings.length_unit == 'MILES':
+            total_length /= 1609.34
+            unit_length = 'mi'
+        else:
+            unit_length = 'm'  # Default to meters if unit is unknown
+        
+        context.workspace.status_text_set(f"Total Edge Length: {total_length:.3f} {unit_length}")
+        self.report({'INFO'}, f"Total Edge Length: {total_length:.3f} {unit_length}")
+        return {'FINISHED'}
+
+def menu_func(self, context):
+    self.layout.operator(Sum_Edge_Lengths.bl_idname)